• Journal of Electrical Engineering and Technology
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• v.12 no.2
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• pp.495-501
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• 2017

The introduction of smart grid, which is an innovative application of digital processing and communications to the power grid, might lead to more and more cyber threats originated from IT systems. In other words, The Energy Management System (EMS) and other communication networks interact with the power system on a real time basis, so it is important to understand the interaction between two layers to protect the power system from potential cyber threats. This paper aims to identify and clarify the cyber security risks and their interaction with the power system in Smart Grid. In this study, the optimal power flow (OPF) and Power Flow Tracing are used to assess the interaction between the EMS and the power system. Through OPF and Power Flow Tracing based analysis, the physical and economic impacts from potential cyber threats are assessed, and thereby the quantitative risks are measured in a monetary unit.

• Journal of Energy Engineering
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• v.24 no.1
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• pp.123-131
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• 2015

This paper aims to identify and clarify the cyber security risks and their interaction with the power system in Smart Grid. The EMS and other communication networks interact with the power system on a real time basis, so it is important to understand the interaction between two layers to protect the power system from potential cyber threats. In this study, the optimal power flow(OPF) and Power Flow Tracing are used to assess the interaction between the EMS and the power system. Through OPF and Power Flow Tracing based analysis, the physical and economic impacts from potential cyber threats are assessed, and thereby the quantitative risks are measured in a monetary unit.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.37 no.2
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• pp.43-54
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• 2014

Environmental pollution including air, land, and water has become one of the most critical issues in global interest. The damages due to environmental pollution lead to serious disasters. Nations have realized the importance of environment protection and have been starting to force organizations to implement environmental management system (EMS) as way of protecting environment. ISO 14001 requirements that are the most popular standard as EMS have been developed to support continuous improvement to environment management. It has been revised once since publication and ISO 14001 : 2004 version is currently available. Organizations globally started to acquire the certificate of EMS to observe environment related laws, accept customers' and stakeholders' request, increase market share, and fulfill implementation motives. This article examines the audit data that were collected for several years from manufacturing companies including shipbuilding, machinery, metal, automobiles, and chemical companies in southeastern Korea on the basis of ISO 14001 : 2004 requirements. The audit data were classified into minor nonconformities based on factors such as business size, business type, and EMS implementation period. We conduct hypotheses test using statistical methods in order to see if there are any significant differences based on the factors. We draw conclusions for the results of hypotheses test and address the necessities of energy, greenhouse gas, green management, and continuous improvement to enhance the efficiency of EMS implementation.

• The Magazine for Energy Service Companies
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• s.57
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• pp.24-27
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• 2009

에너지경영시스템(Energy Management System)이란 최고경영자가 경영방침에 에너지관리 목표를 포함시켜 전사적인 에너지 관리를 추진하는 톱다운(Top-Down) 방식의 에너지관리시스템이다. 에너지 절감을 위해 에너지관리공단에서 도입 및 계획하고 있는 EMS에 대해 알아본다.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.60 no.2
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• pp.231-238
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• 2011

A role of Distribution Automation System(DAS) is required to be changed from observing and control to complex and various new system including functions which monitoring, control, prediction, operation and management of EMS type according to be gradually Smart Grid of distribution operation system for development of further power system industrial. IEC(International Electrotechnical Commission) published communication standards which interface and data model of distribution operation system to IEC 61968 and of host system like EMS(Energy Management System) to IEC 61970. So far, each standards are emphasizing themselves, but if they are applied by designed integration of the standards, it could be more efficiency system. So, in this paper, integration application of IEC standards and structure of further distribution operation system to use them are proposed by gradually increasing importance of communication protocols, functions and roles in further distribution management system considering Smart Grid.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.10a
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• pp.623-625
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• 2015

Recently, the cooling water of power plant was included in RPS(Renewable Portpolio Standard) as water heat energy. Thus the trend of cooling water application is growing bigger for agriculture and fishing industry. Especially as energy consumption cost in agriculture and fishing industry is a vital element, the interests for energy efficiency is growing bigger. The advanced agriculture country like Netherlands is distributing diagnosis software to the farmers based on ICT diagnostic system for the efficient energy consumption and energy demand amounts depend on crops of cultivation in automated horticulture. Hereafter, in the preparation of the expansion of the automated agriculture domestically by the cooling water of power plant, we would like to propose the energy application case(Greenery) in the advanced countries abroad in agriculture and EMS system about the application of the cooling water in power plant.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.21 no.6
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• pp.3-11
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• 2007

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.770-771
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• 2011

발전사업자는 한국전력거래소(KPX)의 급전지령을 원활히 수행하기 위해 EMS(Energy Management System) RTU를 설치하고 있다. 한국수자원공사는 수력발전소에 전기판넬 형식의 EMS RTU 대신 컴퓨터 기반의 가상(Virtual) EMS RTU를 설치하여 기존의 RTU방식에 비하여 설비 면적을 대폭 줄였으며, 설비 변동에 따른 감시제어 데이터의 수정시 하드웨어적인 작업을 소프트웨어적으로 간단하게 처리할 수 있다. 그래서 가상 EMS RTU는 발전통합운영시스템(GIOS)을 실시간으로 운영, 감시하여 장애를 신속히 복구함으로써 중앙급전소 발전기 원격운전 응답 특성을 향상시켜 전력계통의 안정적인 운영에 크게 기여하고 있다.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.258_259
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• 2009

This paper describes the development of robust processor for analyzing network state in Korean Energy Management System. The important function of topology processing is to convert the switching/device model into a bus/branch model by the status of switching devices. The state estimator also provides a consistent unified solution, not only for measurement of the observable system, but also for the unobservable system. The primary function of the online power flow is to provide a highly reliable and flexible power flow solution that can be used to solve a wide variety of power systems problems. The validity of the newly developed functions has been verified through comparative simulations with the existing EMS functions, which are currently in use in the Korean power system.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.519_520
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• 2009

신재생 에너지원을 포함한 대부분의 소용량 분산전원(DER : Distributed Energy Resource)은 22.9 KV 이하의 저압 배전계통에 분포하게 된다. 배전계통에 도입되는 분산전원(DER)에 의한 역조류 문제는 수용가 단의 전압상승 문제를 야기 시킬 뿐 아니라 보호계전 시스템의 전반적인 재검토를 필요로 한다. 출력 제어가 불가능한 분산전원(DER)의 도입량 증가에 따른 무효전력의 수급문제는 기존의 배전망 운영의 개념으로는 효율적인 제어가 어려우며, 유효전력의 급변에 의한 문제도 배전 지역별로 어느 정도 안정화 시킬 필요가 있다. 이를 위해서는 배전 계통운영에도 Energy Management System(D-EMS)의 도입이 필요할 것으로 사료된다. 본 논문은 D-EMS 도입 및 스마트그리드 체제로의 이행을 위한 통신네트워크의 아키텍처 수립을 위한 기능분석 결과이다.